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CN104937245B - The control device of vehicle - Google Patents

The control device of vehicle Download PDF

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Publication number
CN104937245B
CN104937245B CN201380019563.9A CN201380019563A CN104937245B CN 104937245 B CN104937245 B CN 104937245B CN 201380019563 A CN201380019563 A CN 201380019563A CN 104937245 B CN104937245 B CN 104937245B
Authority
CN
China
Prior art keywords
engine
stop
requirement
vehicle
engine stop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201380019563.9A
Other languages
Chinese (zh)
Other versions
CN104937245A (en
Inventor
饭岛树
饭岛一树
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Publication of CN104937245A publication Critical patent/CN104937245A/en
Application granted granted Critical
Publication of CN104937245B publication Critical patent/CN104937245B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18018—Start-stop drive, e.g. in a traffic jam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18109—Braking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1493—Details
    • F02D41/1495—Detection of abnormalities in the air/fuel ratio feedback system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
    • F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
    • F02N11/0829—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode related to special engine control, e.g. giving priority to engine warming-up or learning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0614—Position of fuel or air injector
    • B60W2510/0619—Air-fuel ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/12—Brake pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0644—Engine speed
    • B60W2710/065—Idle condition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
    • F02D2700/07—Automatic control systems according to one of the preceding groups in combination with control of the mechanism receiving the engine power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
    • F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
    • F02N11/0822—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode related to action of the driver
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/08—Parameters used for control of starting apparatus said parameters being related to the vehicle or its components
    • F02N2200/0801—Vehicle speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/10—Parameters used for control of starting apparatus said parameters being related to driver demands or status
    • F02N2200/102—Brake pedal position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

Engine stop that is corresponding with the brake operating of driver and that export requires and in order to carry out fault diagnosis to the air-fuel ratio sensor etc. arranging in the gas extraction system at engine and the engine stop that exports forbids requirement, it is requirement independent of each other, exporting two in the case of require at the same time, preferentially the high engine stop of execution priority requires.So, in the case that the engine stop high according to priority requires to perform engine stop, cancel engine stop and forbid requirement, so that restarting of engine will not unexpectedly be carried out with the releasing of engine stop requirement.

Description

The control device of vehicle
Technical field
The present invention relates to make the control device of the vehicle of engine automatic stop.
Background technology
Use engine and motor as the motor vehicle driven by mixed power in vehicle traction source at the same time In, in order to realize exhaust gas cleaning, fuel consumption when the temporary transient vehicles such as waiting signal stop Improve, even if in vehicle operation, be also carried out making the idle stop (example of engine automatic stop As with reference to patent document 1).
Patent document 1: Japanese Unexamined Patent Publication 2010-179712 publication
Content of the invention
Control at the above-mentioned this vehicle that can make engine automatic stop in vehicle operation In device, for making the engine stop of engine stop require and for forbidding that engine stops Engine stop only forbids requirement, sets output respectively as each independent requirement. For example, engine stop requires when the urgency that the brake operating according to driver produces is slowed down defeated Going out, engine stop forbids that requirement is to be implemented in the operating of engine the air-fuel ratio carrying out The fault diagnosis of sensor and be output.
Export these engine stops contrary each other at the same time to require to forbid with engine stop In the case of requirement, preferentially perform in two requirements according to priority set in advance Side.Here, with and the unrelated engine stop of operation of driver forbid compared with requirement, And in the case of making that corresponding engine stop requires preferentially to perform with the operation of driver, meeting Produce following problem.
That is, have under two situations requiring in output and make engine stop require preferentially to perform In the case of engine stop, when releasing the requirement of this engine stop, because priority is relatively low It is in invalid engine stop during output engine stops requiring and forbid that requirement becomes having Effect, owing to this engine stop forbids that engine stop is forbidden by requirement, is carried out to engine Restart, i.e. restarting of the unexpected engine unrelated with the operation of driver can occur, Sense of discomfort may be brought to driver.
The present invention is exactly to propose in view of the foregoing.That is, the control of the vehicle of the present invention Device, can make engine automatically stop, in the control device of this vehicle, with driver The engine stop that operation is corresponding and exports requires and sending out of exporting based on vehicle operating state Motivation stops forbidding requirement, sets output respectively as each independent requirement, together When output in the case of have two to require, preferentially the high engine stop of execution priority is wanted Ask.Further, require at the engine stop high according to priority and perform the feelings of engine stop Under condition, release another requirement i.e. engine stop and forbid that requirement is forcibly cancelled this and started Machine stops forbidding requirement.
The effect of invention
According to the present invention, owing to making engine stop requirement preferentially perform engine stop In the case of, cancel engine stop and forbid requirement, therefore release preferential engine stop During requirement, will not forbid that requirement is immediately performed restarting of engine due to engine stop, That is, it can be avoided that there is restarting of the unexpected engine unrelated with the operation of driver.By This, will not bring sense of discomfort to driver.In addition, can suppress because of unexpected engine again Start deterioration, the decline of fuel economy of the exhaust causing.
Brief description
Fig. 1 is the mixing representing the control device involved by application one embodiment of the present of invention The structure chart of power car.
Fig. 2 is the structure chart of the control device representing described motor vehicle driven by mixed power.
Fig. 3 is the flow chart representing the control flow involved by the present embodiment.
Fig. 4 is the change representing the various marks etc. under applying the case for this embodiment Sequential chart.
Fig. 5 is the flow chart representing the control flow involved by an alternative embodiment of the invention.
Detailed description of the invention
Below, accompanying drawing, the embodiment explanation present invention are utilized.Fig. 1 illustrates application originally briefly The motor vehicle driven by mixed power of the control device involved by one embodiment of invention.This vehicle is so-called The motor vehicle driven by mixed power of 1 motor 2 clutch type, use engine 11 and electronic simultaneously Machine 12 is as vehicle traction source.Engine 11 is spark-ignition gasoline engine, compresses certainly The device that ignited diesel engine engine etc. produce driving force by burning fuel.Motor 12 is following dynamotor, and it utilizes and produces from the electric power of battery (diagram is omitted) Raw driving force, and the generator of battery charging can be worked as by power regenerating. 1st clutch 13 is installed between engine 11 and motor 12, motor 12 He Automatic transmission the 15 and the 2nd clutch 16 is installed between driving wheel 14.1st clutch Device 13 be the power to engine 11 and motor 12 transmission be connected and disconnected from switch over Device, be attached in the case of utilizing the driving force of engine 11, such as only logical Cross and disconnect in the case that motor 12 travels.2nd clutch 16 is to motor 12 The device being connected and disconnected from switching over of the power transmission with driving wheel 14, travels at vehicle When be attached, in the case that gear is in N shelves, P shelves disconnect.In this embodiment, The frictional engagement key element in automatic transmission 15 is utilized to constitute the 2nd clutch 16, it is achieved to finish The simplification of structure.However, it is also possible to relative to automatic transmission 15, the 2nd clutch 16 is made Be arranged on automatic transmission 15 for independent part before and after.
Fig. 2 schematically illustrates the control device of this motor vehicle driven by mixed power.At this control device In, the multiple control units 21～23 that can store and perform various control process pass through CAN The intercommunication systems such as communication connect.Control unit of engine 22 performs the combustion to engine 11 The material engine such as injection timing control, ignition timing control control.Transmission control unit 23 Perform the speed Control of automatic transmission 15, the switching connecting disconnection of the 2nd clutch 16 Control etc., the 2nd clutch 16 is built in this automatic transmission 15.Hybrid power controls Unit 21 is based on vehicle operating state, in addition to the 1st clutch 13 and motor 12, To described control unit the 22nd, 23 output control signal, the action of Comprehensive Control vehicle.Additionally, In this embodiment, it is configured to utilize hybrid power control unit 21 directly to control the 1st clutch Device the 13rd, motor 12 but it also may be configured to, with engine the 11st, automatic transmission 15 Special controller is similarly set.
Fig. 3 is the flow chart of the control flow wanting portion being denoted as the present embodiment.This program Repeatedly performed every specified time limit (for example, every 10ms) by the control device of Fig. 2.This Outward, step S11～S17 illustrates the process utilizing performed by hybrid power control unit 21, Step S18～S26 illustrates the process utilizing performed by control unit of engine 22.
In step s 11, it is determined whether slow down for anxious, i.e. judge the anxious judgement mark that slows down Whether will is to represent anxious " 1 " slowed down.This urgency deceleration judgement mark passes through transmission control Unit 23 and set, for example, driver enter into brake pedal and with this brake operating phase The deceleration (slippage of speed or its variable quantity) of companion is more than or equal to the situation of setting Under be set as " 1 ".
In the case of being judged to anxious deceleration, enter step S12 from step S11, it is determined that rule Whether fixed engine stop permissive condition is set up.Specifically, it is determined that speed, engine temperature Whether degree, battery charge etc. are in the rated condition that engine can stop.It is being judged to send out In the case that motivation suspension of licence condition is set up, enter step S13, engine stop is permitted Condition criterion mark is set as " 1 ", " 1 " should represent that engine stop permissive condition was set up.
In following step S14, corresponding engine stop will be operated with driver and want Ask mark to be set as " 1 ", " 1 " should represent that there is this engine stop requires, started this Machine stops requiring that mark exports from hybrid power control unit 21 to control unit of engine 22. More specifically, this engine stop requires it is to accompany with disconnecting of the 1st clutch 11 Anxious when slowing down, the idle stop carrying out idle stop for making engine stop requires.Additionally, In this embodiment, it is simply formed as in the case that engine stop permissive condition is set up Output engine stops requiring (engine stop requires with mark=1) but it also may constitute For in the situation that the multiple condition set up comprising engine stop permissive condition is set up Under, output engine stops requiring.
It in described step S11, not " 1 " at anxious deceleration judgement mark, be not i.e. anxious In the case of deceleration, enter step S15, it is determined that the starting permissive condition of engine 11 whether Set up.Namely it is decided that whether speed, engine temperature, battery charge etc. are in engine 11 rated conditions that can start.For example, when dead ship condition and the system of speed substantially 0 Dynamic device switch connection i.e. enter into brake pedal when, be not result in vehicle play moved further unexpectedly and Can stably start engine, it is determined that set up for starting permissive condition.
If starting permissive condition to set up, then enter step S16 from step S15, and will send out The determination flag that motivation stops requiring is set as " 0 ", " 0 " should represent there is not this engine Stop requiring.That is, with start permissive condition establishment as condition, relieve engine stop want Ask.
In described step S12, under the conditions of engine stop permissive condition is invalid, Enter step S17, and engine stop license judgement mark is set as " 0 ", be somebody's turn to do " 0 " Represent that engine stop permissive condition is false, and enter step S16, by engine stop Require that judgement mark is set as " 0 ", " 0 " should represent there is not this engine stop requirement.
The judgement that the engine stop setting in described step S14 or step S16 requires The result of mark, by CAN communication from hybrid power control unit 21 to engine control Unit 22 processed exports.
In step S18, control unit of engine 22 is based on from hybrid power control unit The determination flag that the engine stop of 21 outputs requires, it is determined whether there is engine stop and want Ask (idle stop requirement), whether be i.e. that " 1 " judges to determination flag.If deposited Require at engine stop, then enter step S19, implement being automatically stopped, i.e. in fact of engine Execute idle stop, and mark F is set as " 1 ", " 1 " should represent that being in engine stopped Only state.
In step S20, using as the engine stop setting based on vehicle operating state Forbid that the idle stop of requirement forbids that the mark of requirement is set as " 0 ", cancel idle stop and prohibit Only require, wherein, " 0 " should represent that there is not this idle stop forbade requirement.This idling is stopped Only forbid requirement with engine be in real work by condition implemented, for example to send out Air-fuel ratio sensor set in the gas extraction system of motivation carries out the such process of fault diagnosis Requirement.
Here, with the brake operating of driver corresponding engine stop require and based on Vehicle operating state and the idle stop unrelated with the operation of driver such as the fault diagnosis implemented Forbid requirement, be different requirement independent of each other, enter row operation respectively and set.Therefore, have When export these contrary requirement i.e. engine stops simultaneously and require to forbid requirement with idle stop, In this case, according to priority set in advance, a side is made preferentially to implement.Real at this Execute in example, in order to not bring sense of discomfort to driver, and, in order to realize exhaust gas purification and combustion Material consumes improvement etc., be set as forbidding requirement with idle stop compared with, make with driver operate right The engine stop answered requires preferentially to perform.
Further, in the present embodiment, it is configured to make engine stop requirement excellent as mentioned above In the case of first performing engine stop, in step S20, forcibly release another Individual requirement i.e. idle stop forbids requirement, cancels this idle stop and forbids requirement.
In described step S18, require if there is no engine stop, then enter step S21, it is determined that whether mark F is " 1 ", " 1 " expression should be in engine stop-state. It if mark F is " 1 ", is i.e. in engine stop-state, then enters step S22, will Idle stop for diagnosing requirement forbids that the mark of requirement is set as " 0 ", should " 0 " represent There is not idle stop and forbid requirement.
In following step S23, it is determined whether exist and stepped on by driver's acceleration of entering into The requirement that the operation of plate and the engine that produces are restarted.There is the operation of the acceleration with driver In the case of restarting requirement of corresponding engine, enters step S26, implements engine Restart (bent axle starting), and mark F is set as " 0 ", should " 0 " represent not It is engine stop-state.On the other hand, do not exist the acceleration with driver operation corresponding In the case of restarting requirement of engine, does not carries out restarting of engine and terminates this journey Sequence.
It in described step S21, is not representing " 1 " of engine stop-state at mark F In the case of, i.e. in the case that engine is in operation process, enter step S24, Determine whether that the idle stop existing for fault diagnosis forbids requirement.If there is idle stop Forbid requirement, then enter step S25, the idle stop of fault diagnosis is forbidden the mark of requirement Will is set as representing there is " 1 " that idle stop forbids requirement, enters described step S26, Perform restarting of engine.
On the other hand, in step s 24, stop if there is no the idling for fault diagnosis Only forbid requirement, then enter described step S22, the idle stop of fault diagnosis is forbidden want The mark asked is set as " 0 ", " 0 " should represent that there is not idle stop forbade requirement.Further, In described step S23, it is determined that the engine corresponding with the acceleration operation of driver is again , there is in the case of restarting requirement of engine, in step S26 in the presence or absence of start request In carry out restarting of engine.
Fig. 4 illustrates the sequential chart in the case of control applying the present embodiment as above. If speed declines owing to driver enters into brake pedal, then at moment t1, it is determined that for anxious Slow down and urgency deceleration judgement mark is set as " 1 ", receive this mark and judge engine Whether suspension of licence condition sets up (reference arrow Y1).Become at engine stop permissive condition In the case of vertical, as shown in arrow Y2, engine stop require (mark=1) from mixed Close power control unit 21 to export (moment t2) to control unit of engine 22, perform to send out Being automatically stopped of motivation 11, engine rotary speed is to 0 dramatic decrease.
Then, the time point at moment t3 releases anxious judgement of slowing down, at the time point of moment t4 Speed declines and essentially becomes 0, becomes vehicle stopped state, and brake switch is connected, I.e. enter into brake, thus be judged to that described starting permissive condition is set up, by startings license judgement It is set to " 1 " with mark.So, set up as condition to start permissive condition, by engine Suspension of licence judgement mark is set to " 0 " and releases engine stop license, receives this mark And engine stop requirement judgement mark is set to " 0 ", release engine stop and require (ginseng According to arrow Y3).
At the time point of the moment t2 that the described engine stop of output requires, will transport according to vehicle The idle stop for fault diagnosis turning state and setting forbids that the mark of requirement is set to " 1 ", I.e., also export idle stop and forbid requirement.That is, contrary engine stop is required (idling Stop require) and idle stop forbid that this both sides of requirement export independently.As noted above, In the case of the requirement of both sides is simultaneous, due to and driver operate unrelated fault diagnosis Idle stop forbid that requirement is compared, make to operate corresponding engine stop requirement with driver Preferentially perform, if therefore receiving engine stop requirement, then no matter have or not idle stop and prohibit Only requiring, be performed both by engine is automatically stopped (idle stop).
Here, shown in the comparative example generally as shown in the characteristic by the dotted line L1 in figure, i.e. Making to implement engine stop (idle stop) according to engine stop requirement, idle stop is prohibited The setting only requiring also keeps its state constant, i.e. continues to put out idle stop and forbids requirement.? In such comparative example, releasing the moment t4 that engine stop requires, according to not being released from And retained idle stop forbids that requirement carries out restarting of engine, occur and driver The restarting of the unrelated unexpected engine of operation, sense of discomfort may be brought to driver.
Corresponding thereto, in the present embodiment, preferentially holding according to engine stop requirement Another independent requirement i.e. idle stop is forbidden wanting by the time point t2 of row engine stop The mark asked is set as " 0 ", " 0 " should represent that there is not idle stop forbade requirement, i.e. Cancel idle stop and forbid requirement.Therefore, even if wanting releasing the high engine stop of priority When asking (moment t4), owing to idle stop forbids that requirement has been undone, therefore also will not Unexpectedly carry out restarting of engine, i.e. it can be avoided that the meaning unrelated with the requirement of driver Outer engine is restarted, and avoids bringing sense of discomfort to driver.Further, by driving When the acceleration of person operates and produces engine start request (moment t5), according to this engine Start request and implement restarting automatically of engine.
In addition, in the present embodiment, owing to cancelling idle stop forbid the right of requirement by becoming The engine stop of elephant requires, is defined as when the urgency together of the brake operating with driver is slowed down Idle stop requires, therefore, it is possible to obtain following action effect.
In motor vehicle driven by mixed power the be arranged between engine 11 and motor 12 the 1st from Clutch 13, can inhale effectively mainly as the engine speed having for during normal traveling Receive the device of the frequency characteristic of vibration and used.It is thus impossible to enough absorb fully such as suddenly Engine rotation variation in this low rotary area during deceleration, if by the 1st clutch 13 carry out anxious deceleration in the state of joint, then vibrate and take turns 14 transmission from axially driving, may give Driver brings impact, sense of discomfort.Accordingly, it would be desirable to make the 1st clutch 13 when anxious deceleration Disconnect and make engine stop, i.e. need to carry out idle stop.Thus, as noted above, shape Become, forbid requirement with idle stop compared with, make engine stop during anxious deceleration require idle Speed stops requiring preferentially to carry out.
But, the anxious judgement slowed down is as noted above to be carried out according to the deceleration of vehicle, i.e. It is judged to anxious deceleration in the case that deceleration is more than or equal to setting, but when anxious deceleration, Drastically decline with speed is accompanied, and deceleration also declines in the short period of time.Therefore, in urgency It is the requirement being released from the short period of time that idle stop during deceleration requires.Thus, together When output idle stop require and idle stop is in the state of forbid requirement, according to idle stop When requiring and preferentially implement idle stop, as shown in above-mentioned comparative example, stop not cancelling idling In the case of only forbidding requirement, release idle stop require when idle stop forbid requirement not by The possibility releasing and being retained uprises, and forbids that requirement produces unexpected according to this idle stop The frequency restarted of engine uprises.According to the present embodiment, it can be avoided that this frequency is high Restarting unexpectedly of engine.
Fig. 5 illustrates the embodiment of other of this invention.In this embodiment, omit Fig. 3's The process of step S21～S23, i.e. omit and carry out with the operation of accelerating according to driver Engine restart relevant process.In this case, according to engine stop requirement In the case of preferentially implementing engine stop, another requirement i.e. idle stop forbids requirement quilt Cancel, therefore releasing when engine stop requires and will not forbid that requirement is anticipated because of idle stop Restarting of engine is implemented in other places.Additionally, in the case of the embodiment, from idle stop The engine recurrence restarted with performed by other not shown programs of the engine rising Dynamic requirement is implemented accordingly.
Additionally, in the described embodiment, motor vehicle driven by mixed power applies the present invention, but As long as the vehicle restarted that is automatically stopped of engine can be carried out, then also can be only with Engine is as the vehicle in the source of driving.In addition, in the above-described embodiments, in the control of idle stop System applies the present invention but it also may in the such as vehicle in addition to idle stop travels Engine self-braking control in application the present invention.

Claims (4)

1. a control device for vehicle, it is in vehicle operation, and engine can be made automatic Ground stops,
In the control device of this vehicle,
Corresponding with the brake operating of driver and export for make engine automatic stop send out The engine stop that motivation stops requiring and exporting based on vehicle operating state forbids that requirement is Requirement independent of each other,
Export two in the case of require at the same time, preferentially the high engine of execution priority Stop requiring,
Further, require at the engine stop high according to described priority and perform engine and stop In the case of only, cancel described engine stop and forbid requirement.
2. the control device of vehicle according to claim 1, wherein,
It is for making engine temporarily stop during vehicle parking that described engine stop requires Idle stop only requires,
Described engine stop forbids that requirement is for being implemented in described engine operation process The idle stop of the fault diagnosis carrying out forbids requirement.
3. the control device of vehicle according to claim 1, wherein,
Described vehicle is to use engine and motor to move as the mixing in vehicle traction source simultaneously Power vehicle,
Described engine stop require be will be arranged on described engine and described motor it Between clutch disconnect and make the urgency of the vehicle of engine stop slow down and be output when judging.
4. the control device of vehicle according to any one of claim 1 to 3, wherein,
With described engine stop require corresponding and in the case of perform engine stop, Output and the different requirement of requirement of this engine stop be in the case that i.e. requirement restarted by engine, Perform restarting of engine.
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